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Business and Product Line Acquisitions - Additional Information (Detail) (USD $)
 0 Months Ended 0 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended 0 Months Ended
Jul. 01, 2013
SyrVet, Inc.
Jul. 01, 2013
SyrVet, Inc.
Trademarks
Oct. 01, 2012
Macleod Pharmaceuticals
Oct. 31, 2013
Macleod Pharmaceuticals
Jan. 02, 2013
Scidera Genomics,LLC
Jan. 02, 2013
Scidera Genomics,LLC
Trademarks
Nov. 01, 2013
Prima Tech Incorporated
Nov. 01, 2013
Prima Tech Incorporated
Trademarks
Jan. 02, 2014
Chem Tech Ltd
Jan. 02, 2014
Chem Tech Ltd
Trademarks
Business Acquisition [Line Items]                    
Cash consideration for purchase of business $ 10,012,000   $ 9,918,000   $ 3,400,000   $ 12,068,000   $ 17,185,000  
Contingent consideration potential payment 1,500,000   100,000       600,000   1,000,000  
Purchase price allocation for accounts receivable 747,000   353,000       963,000   380,000  
Purchase price allocation for inventory 2,195,000   1,238,000       2,944,000   4,096,000  
Purchase price allocation for fixed assets 556,000   300,000   246,000   1,653,000   682,000  
Purchase price allocation for current liabilities 226,000   82,000       1,840,000   184,000  
Purchase price allocation for deferred tax liabilities, current     2,054,000              
Allocation of purchase price for contingent consideration potential payment 700,000   100,000       200,000   400,000  
Purchase price allocation for intangible assets 3,010,000   5,542,000   1,585,000   5,275,000   7,536,000  
Business Acquisition Contingent Consideration Cash Payment       62,000            
Purchase price allocation for current assets         35,000          
Purchase price allocation for non-amortizable trademarks   347,000       68,000   196,000   662,000
Sales from International Markets 30.00%                  
Finite lived intangible assets, useful life 15 years           15 years   15 years  
Purchase price allocation for prepaid assets             $ 8,000   $ 225,000